January weather forecast in Hayward

January in Hayward is the most freezing month of the year. In January, the weather in Hayward is typically freezing. Average daily high temperature in January is about 6 degrees below zero. On average, Hayward has 10 cloudy, 9 partly cloudy, 6 snowy, 5 sunny, and 1 rainy day in January. The snowfalls are usually light.